Hispano-Suiza piston aero-engines

Hispano-Suiza piston aero-engines were predominantly piston engines produced by Hispano-Suiza in France, Spain, and under licence in the United Kingdom, the United States and Russia from the First World War through to the 1950s.

Development of these engines started with the very successful V-8 engines which introduced many new features which ensured the success of the Hispano-Suiza line.

The Service technique de l'aéronautique (STAé) used a common designation system for the vast majority of engines produced in France, which signified the major attributes of the particular engines:- Thus the 12Xgrs was of the X family, with reduction gearing and supercharger, whereas the 12Xhrs was identical but rotated in the opposite direction.

The STAé introduced a numbered attribute indicator from the late 1930s, thus; 12Y-26, 12Y-27 – left and right rotation versions of the same engine.

Data from:[1][2][3][4][5][6][8][9][10][12][13][14] This table gives the major attributes of each engine model, where known.